Journal
ACS ENERGY LETTERS
Volume 5, Issue 1, Pages 79-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.9b02112
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Funding
- National Key Research and Development Program of China [2018YFB1500103]
- National Natural Science Foundation of China [61674084]
- Overseas Expertise Introduction Project for Discipline Innovation of Higher Education of China [B16027]
- Tianjin Science and Technology Project [18ZXJMTG00220]
- Fundamental Research Funds for the Central Universities, Nankai University [63191736, ZB19500204]
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Hole transport layers (HTLs) play a crucial role in the efficiency and stability of perovskite solar cells (PSCs). The most efficient PSCs based on spiro-OMeTAD (Spiro) generally have stability problems. Here, NiOx/Spiro HTL has been designed and implemented by combining the advantages of these two films. The results indicated that a device based on a NiOx/Spiro HTL has faster hole extraction ability and better energy alignment than that of a pure Spiro device, thus improving the PCE from 19.8 to 21.66%. Compared with the 60% initial efficiency of Spiro-based devices, the NiOx/Spiro bilayer devices have higher stability and maintain 90% initial efficiency over 1200 h. In this work, NiOx is applied to perovskite devices with N-I-P configuration, which provides a possible mitigation strategy to reduce the V-OC deficit for efficient and stable devices.
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